from tkinter import *

print("Введите начальную координату X:")
X = int(input())
print("Введите начальную координату Y:")
Y = int(input())
print("Введите коэфицент увеличения N:")
N = int(input())

coords = [0,0,10,0,10,10,20,10,20,20,10,20,10,30,0,30,0,0]

if N == 0 and X>=0 and X<=500 and Y>=0 and Y<=500:
    pass
else:
    if N > 0 and 0 * N + X >= 0 and 0 * N + Y >= 0 and 20 * N + X <= 500 and 20 * N + Y <= 500:
        pass
    else:
        if N < 0 and 20*N+X>=0 and 20*N+Y>=0 and 0*N+X<=500 and 0*N+Y<= 500:
            pass
        else:
            print('Размер фигуры превышает максимальный размер поля')
            exit()

root = Tk()
root.title("ИТ марафон")
root.geometry("500x500")

canvas = Canvas(bg="white", width=500, height=500)
canvas.pack(anchor=CENTER, expand=1)

canvas.create_polygon(coords[0] *N*X, coords[1] *N*Y,
                      coords[2] *N*X, coords[3] *N*Y,
                      coords[4] *N*X, coords[5] *N*Y,
                      coords[6] *N*X, coords[7] *N*Y,
                      coords[8] *N*X, coords[9] *N*Y,
                      coords[10] *N*X, coords[11] *N*Y,
                      coords[12] *N*X, coords[13] *N*Y,
                      coords[14] *N*X, coords[15] *N*Y,
                      coords[16] *N*X, coords[17] *N*Y,)

root.mainloop()